TransMilenio is a rapid bus transit system in Bogotá, Colombia, designed to provide efficient public transportation. It operates on dedicated bus lanes, allowing vehicles to bypass traffic congestion. The system features articulated and bi-articulated buses that can carry a large number of passengers, making it a popular choice for commuters. Launched in 2000, TransMilenio has expanded significantly, with multiple lines connecting various neighborhoods and key areas of the city. The system aims to reduce travel times and improve air quality by encouraging the use of public transport over private vehicles.